Live aurora forecast

Northern lights in North Bay tonight

Northern Ontario, Canada · 55° magnetic latitude · Kp 5 threshold

Aurora visibility · North Bay
6/9
Possible tonight

Kp 6 is at the threshold for North Bay. Aurora may be visible from a dark site if cloud cover permits.

QuietStormExtreme
Threshold
Kp 5
Magnetic latitude
~55°N
Bz ↓ south
- nT
Solar wind
- km/s
Density
- p/cm³
Cloud
-
Conditions right now: - Kp + Bz + solar wind + cloud + moon

Updated: 5 Jul, 09:17 UTC

7-day outlook for North Bay

Today
5 Jul
6
Possible
Tomorrow
6 Jul
3
Quiet
Tue
7 Jul
3
Quiet
Wed
8 Jul
3
Quiet
Thu
9 Jul
3
Quiet
Fri
10 Jul
3
Quiet
Sat
11 Jul
3
Quiet

Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.

auroratonight.space

What Kp is needed here?

North Bay sits at a magnetic latitude of approximately 55°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 5 before the auroral oval expands far enough south to be visible from here.

At Kp 5, visibility is possible from North Bay but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.

Plan your viewing

Best dark sky sites near North Bay

Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.

Lake Nipissing North Shore

Get directions ↗
Bortle Class 3 - Rural sky, good dark sky 20 km from North Bay - approximately 25 minute drive

The north shore of Lake Nipissing gives a clear northern horizon across the open water, reducing light pollution to the south and allowing a clean view of lower-altitude aurora arcs. Drive north of the city limits and find a lakeside pullout with minimal road lighting. On a Kp 5 night, a low arc above the tree line is the typical display. The lake reflection adds a foreground when aurora is bright enough to mirror on still water.

Marten River Provincial Park

Get directions ↗
Bortle Class 2 - Excellent dark sky 50 km north of North Bay - approximately 40 minute drive

A small provincial park on the highway north toward Temiskaming. The campground has open clearings facing north with minimal ambient light from surrounding settlements. At 50 km from a city of 50,000, sky brightness is substantially lower than the lakeshore. On Kp 5 nights, aurora structure - bands and rays rather than just a diffuse glow - becomes visible from the campground clearings. The northern Ontario boreal forest provides a classic Canadian aurora silhouette.

Algonquin Provincial Park - Costello Creek

Get directions ↗
Bortle Class 2 - Excellent dark sky 145 km south of North Bay - approximately 2 hour drive

Algonquin is Ontario's pre-eminent dark sky park and has been used for aurora photography for decades. Costello Creek on Highway 60 provides a wide clearing with a clear northern horizon. The park has almost no internal lighting. The drive south is a commitment on a marginal forecast night, but for Kp 5+ storms, Algonquin gives significantly darker skies than anywhere close to North Bay. The Wolf Howl Pond area and Mew Lake campground are alternative dark sky positions within the park.

When to go

Best time to see the northern lights in North Bay

At 55°N magnetic latitude, North Bay sits at the lower end of regular aurora territory. Only the deep mid-winter months of November through January offer nights dark enough for aurora to be visible, and only then when a significant geomagnetic storm pushes the auroral oval this far south.

Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at North Bay's latitude.

Outside November through January, twilight is too bright for aurora viewing even during significant storms. The season is short, but the equinox months on either side of winter can extend it slightly when storm timing aligns.

Up to 8 locations

North Bay

Canada

Possible
Kp 6 need Kp 5
Checking darkness…
Sudbury

Canada

Possible
Kp 6 need Kp 5
Checking darkness…
Thunder Bay

Canada

Good chance
Kp 6 need Kp 3-4
Checking darkness…
The odds

How often does the aurora appear in North Bay?

Average nights per month the Kp reached North Bay's threshold of 5+, from 15 years of geomagnetic data (2010–2024).

1.2Jan
1.3Feb
1.6Mar
1.4Apr
1.2May
1Jun
1.2Jul
1.4Aug
1.5Sep
1.5Oct
1.2Nov
1.1Dec

Counts the Kp 5+ threshold only - cloud cover and local darkness are not included.
Kp data: GFZ German Research Centre for Geosciences, CC BY 4.0

Make it happen

Plan your trip to North Bay

Based on 15 years of geomagnetic data (2010–2024)

1st
March
1.6
avg aurora nights
Requires an extended stay
2nd
September
1.5
avg aurora nights
Requires an extended stay
3rd
October
1.5
avg aurora nights
Requires an extended stay

Best window

The August to October window averages 4 aurora nights - the strongest consecutive stretch of the year.

How long to stay

Aurora at this latitude requires patience - allow as many nights as possible during March.

From the community

Aurora photographs from North Bay

Real photos sourced from Wikimedia Commons.

Aurora over North BayAurora over North Bay
Aurora over North BayAurora over North Bay
Aurora over North BayAurora over North Bay
Aurora over North BayAurora over North Bay
Aurora over North BayAurora over North Bay
Aurora over North BayAurora over North Bay
Questions

Common questions about aurora in North Bay

Can you see the northern lights from North Bay?
Yes, from dark sky sites north and west of the city during stronger storms. North Bay sits at about 55° geomagnetic latitude - the latitude measured from Earth's magnetic poles, which is what governs where aurora reaches. That is several degrees higher than its map position of 46°N, because the geomagnetic pole sits over northern Canada, so aurora reaches it more often than its map latitude suggests. The city itself has light pollution that suppresses fainter displays, but driving 20-50 km north on Highway 11 toward Marten River or along the Lake Nipissing north shore gives substantially darker conditions. On Kp 5 nights, aurora structure - bands and rays - becomes visible above the tree line.
What Kp is needed for aurora in North Bay?
Kp 5 from dark sites outside the city. At about 55° geomagnetic latitude, North Bay needs a moderate geomagnetic storm to bring the auroral oval far enough south. A faint low arc may appear from the darkest sites north of town as Kp approaches 5, with visible structure - bands, rays, and colour - at Kp 5 and above. The Kp index (a global measure of geomagnetic activity on a 0-9 scale) is updated every 3 hours - check it before driving out.
What are the best dark sky sites near North Bay?
Marten River Provincial Park, 50 km north on Highway 11, is the best close-in option with Bortle 2 skies and open clearings. The Lake Nipissing north shore gives a dark water horizon within 20 km of the city. For a major storm, Algonquin Provincial Park - 145 km south - offers designated dark sky areas with some of the best skies in Ontario. The key is getting north of the city, away from its light dome, and finding a clear northern horizon.
How does North Bay compare to Sudbury for aurora?
Both cities sit at about 55° geomagnetic latitude and share essentially the same Kp threshold of 5. The practical difference is access to dark sky: Sudbury has Killarney Provincial Park about 70 km south, offering exceptional dark skies and a south Georgian Bay horizon. North Bay has Marten River 50 km north and Algonquin 145 km south. Neither city has a clear advantage in terms of aurora frequency - the choice comes down to which dark sky sites suit the observer.
When is the best time to see northern lights in North Bay?
August to April, with September and March the most geomagnetically active months statistically. Northern Ontario has adequate darkness from late August, and nights lengthen through winter to around 15 hours in December. The equinox effect - where the Russell-McPherron effect increases the frequency of geomagnetic storms around the equinoxes - makes September and March the most productive months. Avoid June and July when nights are too short for comfortable dark sky viewing.
Photograph the aurora

Recommended gear

Tested picks for capturing the aurora on long, cold nights.

As an Amazon Associate, Aurora Tonight earns from qualifying purchases. Affiliate links never influence the forecast or which gear is recommended.

Aurora Tonight

Aurora Tonight

Add to your home screen for instant aurora alerts

Add to your home screen

Tap then Add to Home Screen for instant aurora alerts